Test Index

BECE Science 2016 Paper

Question : 8

Total: 40

\mathrm{Ca(OH)_2}

Solution:

Concept:

The number of elements in a compound means the different types of atoms present in it.

Explanation:

The compound is

\mathrm{Ca(OH)_2}

It contains calcium (

\mathrm{Ca}

), oxygen (

\mathrm{O}

), and hydrogen (

\mathrm{H}

These are three distinct elements.

Thus, the total number of elements in

\mathrm{Ca(OH)_2}

is 3.

Answer:

B. 3

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